Chapter 2.4

Outline:

Instruments and Devices used
- Creep Meters
  - One side of the fault is a bulb with the meter, the other side a post anchored to the ground.
  - The weight will move to how far up the meter.
  - This device is for horizontal movement.
- Laser-Ranging Devices
  - One side of the fault has the laser and the other side with a reflector.
  - It caculates how far it moved by time difference.
  - This is for any movement.
- Tilt-meters
  - This device detects vertical movement.
  - A bulb of water with an amount of water is anchored on both sides.
  - Both bulbs will tilt, and the water will flow and determine information by the meter
- Satellite Monitors
  - This is used for any (most likely vertical) movement
Monitoring Faults and Predicting Earthquakes
- Stress builds until earthquake strikes
- But, the earthquake can fail to happen
- So, seismologists can not accurately predict the earthquakes
- What seismologists know is that there is risk around faults that have had earlier major earthquakes